Wikipedia:WikiProject Canada Roads/Quebec/Routes in Montreal

Route 3 in Longueuil via Chemin de Chambly and Route 112
Later extended along Rue Saint Charles to Route 9B when Route 3 moved to current Route 132; soon moved again to overlap Route 9 from Saint-Hubert
Final route became Route 112

Route 338 to Dorion, then crossed Ile Perrot on Grand Avenue (?) with Route 17, and joined Route 37 at Sainte-Anne; followed Route 37 (which see) to Lachine; split onto Boulevard Saint-Joseph and followed ? to Rue Sherbrooke; got through downtown to Rue Notre Dame and again followed Route 37 to Bout-de-l'Ile; then followed Route 344 from Charlemagne (Route 2B used Route 138)
Moved onto Metropolitan Boulevard between Sainte-Anne and Montreal-Ouest when completed, and remained on Rue Sherbrooke to Bout-de-l'Ile; also replaced Route 2B, with old Route 2 there becoming Route 48; a new Route 2B created on Cote de Liesse Road between Route 2 and Route 8/11A
Final route became Route 338, Autoroute 20, Route 138

Route 132 and Rune Principale/Boulevard d'Anjou in Chateauguay, then east from Caughnawaga on Old Malone Highway and Boulevard Marie-Victorin (partially gone), then Route 132 and old alignments again
Final route became Route 132

Route 138 to a ferry from Caughnawaga to Lachine, then along Route 2 (which see) to downtown
Moved onto the Pont Honore-Mercier when it opened
Final route became Route 138

Overlapped Route 14/later Route 9B (Route 104) from Saint-Jean-sur-Richelieu to La Prairie, but continued beyond where Route 14 turned (Route 134) to Route 3 (Route 132) and presumably entered Montreal on a bridge
An alternate route (or realignment?) later followed Route 9B (Route 134) to Rue Victoria and on Boulevard Simard to near Pont Victoria; later used Rue Victoria to Route 112 over the bridge
Final route became Route 104, Route 134, no number, Route 112